Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 12,2021, Pages 831-835, doi:10.3760/cma.j.cn112141-20211009-00574
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 12,2021, Pages 868-875, doi:10.3760/cma.j.cn112141-20210831-00477
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 12,2021, Pages 876-880, doi:10.3760/cma.j.cn112141-20210720-00389
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 12,2021, Pages 825-830, doi:10.3760/cma.j.cn112141-20211020-00606
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 12,2021, Pages 836-841, doi:10.3760/cma.j.cn112141-20210803-00418